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use crate::HashId;
use git2::Repository;
use std::sync::Arc;
/// Represent a commit on a repository
///
/// When creating a commit object, it is guaranteed that it exists in
/// the repository.
#[derive(Clone)]
pub struct Commit {
pub id: HashId,
repo: Arc<Repository>,
}
impl Commit {
/// Create a commit object and check if it exists in the repo
pub fn new(r: &Arc<Repository>, id: HashId) -> Option<Self> {
r.find_commit(id.to_oid()).ok().map(|_| Self {
id,
repo: Arc::clone(r),
})
}
pub fn id_str(&self) -> String {
self.id.to_string()
}
pub fn summary(&self) -> String {
self.find().summary().unwrap().into()
}
pub fn parent_count(&self) -> usize {
self.repo
.find_commit(self.id.to_oid())
.unwrap()
.parent_count()
}
/// Return the first parent, if it exists
pub fn first_parent(&self) -> Option<Self> {
self.find()
.parent(0)
.ok()
.and_then(|c| Self::new(&self.repo, c.id().into()))
}
pub fn parent(&self, num: usize) -> Option<Self> {
self.find()
.parent(num)
.ok()
.and_then(|c| Self::new(&self.repo, c.id().into()))
}
pub fn parents(&self) -> Vec<Commit> {
self.find()
.parents()
.map(|c| Self::new(&self.repo, c.id().into()).unwrap())
.collect()
}
fn find(&self) -> git2::Commit {
self.repo.find_commit(self.id.to_oid()).unwrap()
}
}
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